Originally Posted by 65WSM
I used 140 gr Sierra GKs as a low cost test bullet:
64.0 gr N 217 2894 66.0 gr N 217 3053 66.5 gr N 217 3067 67.0 gr N 217 3081
Next I tried the 160 Sierra Semi-pointed as a stand in for the expensive 160 gr Woodleighs
160 Sie SemiP 61.5 gr N 217 2768 160 Sie SemiP 62.0 gr N 217 2807 160 Sie SemiP 62.5 gr N 217 2862 160 Sie SemiP 63.0 gr N 217 2903
160 Sie SemiP 62.0 gr Retumbo 2899
160 Sie SemiP 62.5 gr VV N570 2952
I shot two shot strings of the 160gr SMPs at different bulls. All were touching at 100 yards. This powder shows promise with heavier than normal bullets in magnum cases. Norma says this is the famous powder that produces 3400 fps with 180 gr bullets in the Norma 30-378. When this load first came out we verified it as soon as we got our hands on the rifles and factory ammo. I was working at Arnold Arms at the time. Unlike Remington and Winchester data, the Norma loads lived up to their billing.
Norma 217 is slightly slower than VV N-570 but is much more manageble because the kernel size is more like Retumbo. Norma 217 is way slower than Retumbo.
I used CCI 250 primers with Norma 217 because that is all I have on hand.
Just so I am clear, this was with a 6.5WSM??? Dad is having one built as we speak and has been looking for some data and a jumping off powder.